Read descriptions of two different classrooms. Identify which of the guidelines for creating a positive writing environment are best represented in each example and compare your answers to samples answers provided.

Classify the different types of numbers we use, and learn how numbers and operations relate to one another. Start with counting numbers and then add integers, rationals, algebraic, and, finally, real numbers to the line.

Play an animation that incorporates most types of energy transfers and conversions into a chain reaction. Then rerun the animation and answer questions to test your understanding of how energy can travel and change.